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$873+ Cheap flights from Idaho to Sydney (SYD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$874
(United Airlines)

Popular in

December

Cheapest in

May

Average price

$1,292
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flights.
Search Deals
From Idaho to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($368 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($102 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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Find flight deals from Idaho to Sydney

Cheapest flights from Idaho to Sydney
Explore the most affordable flight options available from Idaho to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/142:05 pmGEG - SYD
1 stop24h 10mUnited Airlines
jue. 11/2712:10 pmSYD - GEG
1 stop19h 59mUnited Airlines
Deal found 2/19$873
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/811:02 amBOI - SYD
1 stop27h 53mUnited Airlines
mié. 5/2110:20 amSYD - BOI
1 stop17h 01mUnited Airlines
Deal found 2/19$874
This American Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/81:52 pmBOI - SYD
2 stops25h 13mAmerican Airlines
mié. 5/219:10 amSYD - BOI
2 stops23h 30mAmerican Airlines
Deal found 2/19$903
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/153:47 pmGEG - SYD
2 stops22h 18mAmerican Airlines
mié. 8/209:10 amSYD - GEG
2 stops23h 06mAmerican Airlines
Deal found 2/20$903
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/167:15 amGEG - SYD
2 stops30h 20mDelta
jue. 10/3010:05 amSYD - GEG
2 stops26h 43mDelta
Deal found 2/19$971
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/137:15 amBOI - SYD
1 stop29h 50mDelta
lun. 3/241:15 pmSYD - BOI
1 stop26h 35mDelta
Deal found 2/19$1,160
This KAYAK deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/202:05 pmGEG - SYD
2 stops25h 20mAir New Zealand
mié. 11/267:15 pmSYD - GEG
2 stops45h 09mAir New Zealand
Deal found 2/19$1,244
This Alaska Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/182:40 pmGEG - SYD
1 stop23h 20mAlaska Airlines
lun. 11/2411:15 amSYD - GEG
2 stops30h 38mAlaska Airlines
Deal found 2/19$1,253
This Fareboom deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/151:31 pmBOI - SYD
2 stops29h 04mAir New Zealand
dom. 4/209:55 amSYD - BOI
2 stops27h 18mAir New Zealand
Deal found 2/19$1,378
This Travelocity deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/152:40 pmGEG - SYD
1 stop23h 25mMultiple Airlines
mié. 8/205:35 pmSYD - GEG
1 stop21h 58mMultiple Airlines
Deal found 2/20$1,514
This Qantas Airways deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/202:40 pmGEG - SYD
1 stop21h 45mQantas Airways
vie. 11/282:30 pmSYD - GEG
1 stop25h 16mQantas Airways
Deal found 2/19$1,693
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/158:08 amBOI - SYD
1 stop30h 27mMultiple Airlines
dom. 4/209:40 pmSYD - BOI
2 stops31h 59mMultiple Airlines
Deal found 2/19$1,783

Find flights from Idaho to Sydney within your budget

Customize your flight search to find flights from Idaho to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated febrero 20, 2025.

Fly from

Idaho

Fly to

Sydney

Route

Depart

Return

Price

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 5/8

11:02 am-6:55 am

1 stop27h 53m

Sydney Kingsford Smith

mié. 5/21

10:20 am-11:21 am

1 stop17h 01m

$874

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jue. 7/31

5:15 am-6:55 am

2 stops32h 40m

Sydney Kingsford Smith

sáb. 8/16

9:30 am-9:56 pm

2 stops29h 26m

$878

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 5/8

1:52 pm-7:05 am

2 stops25h 13m

Sydney Kingsford Smith

mié. 5/21

9:10 am-4:40 pm

2 stops23h 30m

$903

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

vie. 8/15

3:47 pm-7:05 am

2 stops22h 18m

Sydney Kingsford Smith

mié. 8/20

9:10 am-3:16 pm

2 stops23h 06m

$903

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

jue. 7/31

1:30 pm-6:35 am

1 stop24h 05m

Sydney Kingsford Smith

sáb. 8/16

9:25 am-12:11 pm

1 stop19h 46m

$1,104

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

jue. 3/13

7:15 am-6:05 am

1 stop29h 50m

Sydney Kingsford Smith

lun. 3/24

1:15 pm-10:50 pm

1 stop26h 35m

$1,160

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

mar. 4/15

11:35 am-7:05 am

2 stops26h 30m

Sydney Kingsford Smith

dom. 4/20

9:10 am-7:56 pm

2 stops27h 46m

$1,253

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 4/15

1:31 pm-10:35 am

2 stops29h 04m

Sydney Kingsford Smith

dom. 4/20

9:55 am-9:13 pm

2 stops27h 18m

$1,378

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

vie. 8/15

2:40 pm-7:05 am

1 stop23h 25m

Sydney Kingsford Smith

mié. 8/20

5:35 pm-10:33 pm

1 stop21h 58m

$1,514

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

mar. 4/15

8:08 am-6:35 am

1 stop30h 27m

Sydney Kingsford Smith

dom. 4/20

9:40 pm-1:39 pm

2 stops31h 59m

$1,783

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 17 results
1
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Best time to book a flight from Idaho to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Idaho to Sydney

Get recent, data-driven insights about flights from Idaho to Sydney including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Idaho to Sydney?

Currently, February is the cheapest month in which you can book a flight from Idaho to Sydney (average of $1,051). Flying from Idaho to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SYD?

Find hourly flight availability from Idaho to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated febrero 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Sydney as you normally would.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated febrero 20, 2025.
To help decide which airline to fly from Idaho to Sydney, see what other customers have to say about Air Tahiti Nui, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui
8.7
Very good
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Alaska Airlines
8.0
Very good
9,692 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Delta
8.0
Very good
8,220 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air New Zealand
7.9
Good
461 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

LATAM Airlines
7.5
Good
1,795 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Boarding

8.7

Comfort

8.0

Food

7.8

Overall

8.7

Entertainment

7.2

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Idaho?

    If you book a flight to Sydney from Idaho, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.

  • Can I find deals for flights from Idaho to Sydney that include hotel bookings?

    Yes. In addition to deals on Idaho to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Sydney.

  • Can I find deals for business class flights from Idaho to Sydney?

    Yes. Cheapflights offers flight deals from Idaho to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Idaho to Sydney (average of $1,051). Flying from Idaho to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Idaho?

Book flights to Idaho if you plan to visit one of these locations
Wollongong
Parramatta
Coogee
Manly

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Top 2 airlines flying from Idaho to Sydney

Discover the top 2 airlines that operate flights from Idaho to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,393FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,059Average$1,641FlexibilityNo cancel feeOn-timeN/A
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